:root {
  color-scheme: light;
  --ground: #ecece6;
  --page: #fdfcf7;
  --ink: #162727;
  --muted: #687574;
  --rule: #d5d8d0;
  --blue: #0c4147;
  --blue-bright: #16616a;
  --red: #bc4f38;
  --wash: #e5efec;
  --note: #f2efe5;
  --shadow: 0 28px 80px rgba(25, 42, 39, .10);
  --ui: "IBM Plex Sans Arabic", Tahoma, sans-serif;
  --reading: "Noto Naskh Arabic", "Traditional Arabic", serif;
  --display: "Reem Kufi", var(--ui);
}

[data-theme="dark"] {
  color-scheme: dark;
  --ground: #101818;
  --page: #172120;
  --ink: #f1f0e8;
  --muted: #a6b2af;
  --rule: #34413e;
  --blue: #75b6b8;
  --blue-bright: #9acfd0;
  --red: #e27b62;
  --wash: #203533;
  --note: #242b27;
  --shadow: 0 28px 80px rgba(0, 0, 0, .25);
}

* { box-sizing: border-box; }
html { font-size: 16px; }
body {
  margin: 0;
  min-width: 320px;
  min-height: 100vh;
  overflow: hidden;
  background: var(--ground);
  color: var(--ink);
  font-family: var(--ui);
  -webkit-font-smoothing: antialiased;
}
button, textarea { font: inherit; color: inherit; }
button { cursor: pointer; }
button:focus-visible, textarea:focus-visible, a:focus-visible { outline: 2px solid var(--red); outline-offset: 4px; }

.skip-link { position: fixed; top: .75rem; right: 5rem; z-index: 100; transform: translateY(-180%); padding: .6rem .9rem; background: var(--ink); color: var(--page); text-decoration: none; }
.skip-link:focus { transform: none; }

.app-frame { display: grid; grid-template-columns: 270px minmax(0, 1fr) 64px; grid-template-areas: "saved product spine"; height: 100dvh; direction: ltr; }
.saved-rail {
  grid-area: saved;
  min-width: 0;
  display: grid;
  grid-template-rows: 64px minmax(0, 1fr) auto;
  border-left: 1px solid var(--rule);
  background: color-mix(in srgb, var(--note) 62%, var(--page));
  direction: rtl;
}
.saved-rail-head { display: flex; align-items: center; justify-content: space-between; padding: 0 1.15rem; border-bottom: 1px solid var(--rule); }
.saved-rail-head strong { font-family: var(--reading); font-size: 1.05rem; }
.saved-rail-head span { display: grid; min-width: 25px; height: 25px; place-items: center; border-radius: 50%; background: var(--page); color: var(--muted); font-size: .65rem; }
.saved-rail-list { min-height: 0; overflow-y: auto; padding: .75rem; scrollbar-width: thin; scrollbar-color: var(--rule) transparent; }
.rail-discussion { display: block; width: 100%; padding: .78rem .85rem; border: 1px solid transparent; border-radius: 9px; background: transparent; text-align: right; transition: .18s ease; }
.rail-discussion + .rail-discussion { margin-top: .3rem; }
.rail-discussion:hover { background: color-mix(in srgb, var(--page) 72%, transparent); }
.rail-discussion.is-current { border-color: color-mix(in srgb, var(--blue) 20%, var(--rule)); background: var(--page); box-shadow: 0 8px 22px rgba(25,42,39,.05); }
.rail-discussion strong { display: block; overflow: hidden; font-family: var(--reading); font-size: .94rem; font-weight: 600; text-overflow: ellipsis; white-space: nowrap; }
.rail-discussion small { display: block; margin-top: .2rem; color: var(--muted); font-size: .62rem; }
.rail-empty { margin: 2rem .5rem; color: var(--muted); font-family: var(--reading); font-size: .9rem; text-align: center; }
.rail-new-thread { display: flex; align-items: center; justify-content: center; gap: .45rem; margin: .75rem; padding: .7rem; border: 1px solid var(--rule); border-radius: 9px; background: var(--page); color: var(--ink); font-size: .72rem; }
.rail-new-thread:hover { border-color: var(--red); }
.rail-new-thread svg { width: 15px; fill: none; stroke: currentColor; stroke-width: 1.7; }
.spine {
  grid-area: spine;
  position: relative;
  z-index: 20;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 0;
  background: var(--blue);
  color: #f8f5e9;
}
.monogram {
  display: grid;
  width: 42px;
  height: 42px;
  place-items: center;
  border: 1px solid rgba(255,255,255,.38);
  color: inherit;
  font-family: var(--reading);
  font-size: 1.6rem;
  line-height: 1;
  text-decoration: none;
}
.spine nav { display: grid; gap: .65rem; }
.spine-action { display: grid; width: 42px; height: 42px; place-items: center; border: 0; background: transparent; color: rgba(255,255,255,.62); transition: .2s ease; }
.spine-action:hover, .spine-action.is-active { background: rgba(255,255,255,.12); color: #fff; }
.spine-action.is-active::after { position: absolute; right: 0; width: 3px; height: 22px; background: var(--red); content: ""; }
.spine-action svg { width: 20px; fill: none; stroke: currentColor; stroke-linecap: square; stroke-linejoin: miter; stroke-width: 1.5; }
.siglum { font-family: var(--reading); font-size: 1.25rem; }

.product { min-width: 0; min-height: 0; height: 100dvh; overflow: hidden; display: grid; grid-template-rows: 64px minmax(0, 1fr) auto; direction: rtl; }
.product { grid-area: product; }
.masthead {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  padding: 0 clamp(1.25rem, 3vw, 3rem);
  border-bottom: 1px solid var(--rule);
  background: var(--page);
}
.wordmark { display: flex; align-items: baseline; gap: .7rem; justify-self: start; }
.wordmark strong { font-family: var(--display); font-size: 1.05rem; font-weight: 600; }
.wordmark span { color: var(--muted); font-size: .72rem; }
.source-switch { display: inline-flex; align-items: center; gap: .7rem; padding: .45rem .7rem; border: 0; background: transparent; color: var(--muted); font-size: .78rem; }
.source-switch:hover { color: var(--blue-bright); }
.source-dots { display: flex; direction: rtl; }
.source-dots i { display: grid; width: 27px; height: 27px; place-items: center; margin-left: -6px; border: 1px solid var(--page); border-radius: 50%; background: var(--blue); color: #fff; font-family: var(--reading); font-size: .8rem; font-style: normal; }
.source-dots i:last-child { background: var(--red); }
.new-thread { display: inline-flex; align-items: center; gap: .4rem; justify-self: end; padding: .5rem 0; border: 0; border-bottom: 1px solid transparent; background: transparent; color: var(--muted); font-size: .75rem; }
.new-thread:hover { border-bottom-color: var(--red); color: var(--ink); }
.new-thread svg { width: 15px; fill: none; stroke: currentColor; stroke-width: 1.7; }
.header-actions { display: flex; align-items: center; gap: 1rem; justify-self: end; direction: rtl; }
.history-trigger { display: none; min-width: 38px; height: 34px; align-items: center; justify-content: center; gap: .35rem; padding: 0 .45rem; border: 1px solid var(--rule); background: transparent; color: var(--muted); font-size: .68rem; }
.history-trigger:hover { border-color: var(--red); color: var(--ink); }
.history-trigger svg { width: 15px; fill: none; stroke: currentColor; stroke-width: 1.6; }

.folio {
  position: relative;
  min-height: 0;
  overflow-y: auto;
  background:
    radial-gradient(circle at 82% 8%, color-mix(in srgb, var(--wash) 72%, transparent), transparent 34rem),
    var(--page);
  scrollbar-width: thin;
  scrollbar-color: var(--rule) transparent;
}

.opening { display: grid; width: min(780px, calc(100% - 3rem)); min-height: 100%; place-content: center; gap: 2.4rem; margin: 0 auto; padding: 3rem 0; text-align: center; animation: enter .55s cubic-bezier(.2,.8,.2,1) both; }
.opening-main { display: grid; justify-items: center; min-width: 0; }
.source-seal { display: flex; direction: rtl; margin-bottom: 1.15rem; }
.source-seal span { display: grid; width: 34px; height: 34px; place-items: center; margin-left: -7px; border: 2px solid var(--page); border-radius: 50%; background: var(--blue); color: #fff; font-family: var(--reading); font-size: 1rem; box-shadow: 0 8px 22px rgba(12,65,71,.12); }
.source-seal span:last-child { background: var(--red); }
.rubric { margin: 0 0 .55rem; color: var(--red); font-size: .7rem; font-weight: 600; letter-spacing: .04em; }
.opening h1 { margin: 0; font-family: var(--reading); font-size: clamp(4.2rem, 8vw, 7rem); font-weight: 500; line-height: 1; letter-spacing: -.035em; }
.opening-note { margin: .85rem 0 0; color: var(--muted); font-size: .82rem; }
.opening-aside { width: 100%; }
.prompts { display: grid; grid-template-columns: repeat(3, 1fr); gap: .65rem; }
.prompts button { min-height: 54px; padding: .8rem 1rem; border: 1px solid var(--rule); border-radius: 10px; background: color-mix(in srgb, var(--page) 86%, transparent); color: var(--muted); font-family: var(--reading); font-size: .96rem; text-align: center; transition: .2s ease; }
.prompts button:hover { transform: translateY(-2px); border-color: var(--red); color: var(--ink); box-shadow: 0 10px 28px rgba(25,42,39,.06); }

.reading { width: min(780px, calc(100% - 3rem)); margin: 0 auto; padding: 2rem 0 6rem; }
.discussion-head { display: flex; align-items: center; justify-content: space-between; gap: 2rem; margin-bottom: 2.6rem; padding-bottom: .9rem; border-bottom: 1px solid var(--rule); }
.discussion-head h1 { overflow: hidden; margin: 0; font-family: var(--reading); font-size: 1.1rem; font-weight: 600; line-height: 1.4; text-overflow: ellipsis; white-space: nowrap; }
.save-discussion { display: inline-flex; flex: 0 0 auto; align-items: center; gap: .4rem; padding: .45rem .65rem; border: 1px solid var(--rule); border-radius: 8px; background: var(--page); color: var(--muted); font-size: .68rem; transition: .18s ease; }
.save-discussion:hover { border-color: var(--red); color: var(--ink); }
.save-discussion.is-saved { border-color: transparent; background: var(--wash); color: var(--blue-bright); cursor: default; }
.save-discussion svg { width: 14px; fill: none; stroke: currentColor; stroke-width: 1.6; }
.save-discussion.is-saved svg { fill: currentColor; }
.conversation { display: grid; gap: 3rem; }
.turn { display: grid; gap: 1.1rem; }
.turn + .turn { padding-top: 3rem; border-top: 1px solid var(--rule); }
.question-head { justify-self: start; max-width: 85%; padding: .7rem 1rem; border: 1px solid color-mix(in srgb, var(--blue) 16%, var(--rule)); border-radius: 14px 14px 14px 3px; background: var(--wash); }
.question-head h1 { margin: 0; font-family: var(--reading); font-size: 1.15rem; font-weight: 600; line-height: 1.55; }
.answer { padding: .2rem .25rem 0; }
.answer-state { display: inline-flex; align-items: center; gap: .45rem; margin-bottom: .75rem; color: var(--red); font-size: .68rem; font-weight: 600; }
.answer-state::before { width: 6px; height: 6px; border-radius: 50%; background: currentColor; content: ""; }
.answer h2 { margin: 0 0 .55rem; font-family: var(--reading); font-size: clamp(1.65rem, 3vw, 2rem); font-weight: 600; line-height: 1.4; }
.answer-copy { max-width: 44rem; margin: 0; color: var(--ink); font-family: var(--reading); font-size: 1.12rem; line-height: 1.9; white-space: pre-line; }
.answer-quote { margin: 1.1rem 0 0; padding: .85rem 1rem; border-right: 2px solid var(--red); background: var(--note); }
.answer-quote blockquote { margin: 0; color: var(--ink); font-family: var(--reading); font-size: 1.02rem; line-height: 1.8; }
.answer-quote p { margin: .45rem 0 0; color: var(--muted); font-size: .78rem; line-height: 1.65; }
.answer-quote figcaption { margin-top: .55rem; color: var(--red); font-size: .66rem; }
.answer-notice { display: inline-block; margin: 1rem 0 0; padding: .45rem .75rem; border-radius: 6px; background: var(--note); color: var(--muted); font-size: .7rem; line-height: 1.55; }
.sources-disclosure { overflow: hidden; margin-top: .25rem; border: 1px solid var(--rule); border-radius: 10px; background: color-mix(in srgb, var(--page) 88%, transparent); }
.sources-disclosure summary { display: flex; align-items: center; gap: .55rem; padding: .7rem .85rem; color: var(--muted); font-size: .72rem; list-style: none; cursor: pointer; }
.sources-disclosure summary::-webkit-details-marker { display: none; }
.sources-disclosure summary b { display: grid; min-width: 20px; height: 20px; place-items: center; border-radius: 50%; background: var(--wash); color: var(--blue-bright); font-size: .66rem; }
.sources-disclosure summary svg { width: 16px; margin-right: auto; fill: none; stroke: currentColor; stroke-width: 1.7; transition: transform .2s ease; }
.sources-disclosure[open] summary svg { transform: rotate(180deg); }
.margin-notes { display: grid; gap: 0; padding: 0 .85rem .4rem; border-top: 1px solid var(--rule); }
.citation { position: relative; display: grid; grid-template-columns: 24px minmax(0, 1fr); gap: .65rem; padding: .9rem 0; border-bottom: 1px solid var(--rule); }
.citation:last-child { border-bottom: 0; }
.citation-number { display: grid; width: 22px; height: 22px; place-items: center; border-radius: 50%; background: var(--blue); color: #fff; font-size: .66rem; }
.citation-title strong { display: block; font-family: var(--reading); font-size: .95rem; font-weight: 600; }
.citation-title small { display: block; margin-top: .1rem; color: var(--muted); font-size: .68rem; line-height: 1.5; }
.citation blockquote { grid-column: 2; display: -webkit-box; overflow: hidden; margin: .1rem 0 0; color: var(--muted); font-family: var(--reading); font-size: .9rem; line-height: 1.75; -webkit-box-orient: vertical; -webkit-line-clamp: 4; }
.thinking { display: flex; align-items: center; gap: .5rem; color: var(--muted); font-family: var(--reading); font-size: 1rem; }
.thinking i { width: 5px; height: 5px; background: var(--red); border-radius: 50%; animation: blink 1.2s infinite; }
.thinking i:nth-child(2) { animation-delay: .18s; }.thinking i:nth-child(3) { animation-delay: .36s; }

.ask-dock { position: relative; z-index: 10; padding: .65rem 1rem .55rem; border-top: 1px solid color-mix(in srgb, var(--rule) 70%, transparent); background: color-mix(in srgb, var(--page) 94%, transparent); backdrop-filter: blur(16px); }
.ask-form { display: grid; grid-template-columns: minmax(0, 1fr) 44px; align-items: center; gap: .65rem; width: min(780px, 100%); margin: 0 auto; padding: .42rem .5rem .42rem 1rem; border: 1px solid var(--rule); border-radius: 14px; background: var(--page); box-shadow: 0 12px 35px rgba(25,42,39,.07); }
.ask-form:focus-within { border-color: var(--blue-bright); box-shadow: 0 14px 40px rgba(12,65,71,.1); }
.ask-form label { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0,0,0,0); }
.ask-form textarea { width: 100%; max-height: 120px; resize: none; border: 0; outline: 0; padding: .38rem 0; background: transparent; color: var(--ink); font-family: var(--reading); font-size: 1.05rem; line-height: 1.55; }
.ask-form textarea::placeholder { color: color-mix(in srgb, var(--muted) 65%, transparent); }
.ask-button { display: grid; width: 42px; height: 42px; place-items: center; border: 0; border-radius: 10px; background: var(--blue); color: #fff; transition: .2s ease; }
.ask-button:hover { background: var(--red); }
.ask-button:disabled { opacity: .5; cursor: wait; }
.ask-button svg { width: 20px; fill: none; stroke: currentColor; stroke-width: 1.7; }
.dock-caption { display: block; margin: .3rem auto 0; color: var(--muted); font-size: .61rem; text-align: center; }

dialog { width: min(520px, calc(100% - 2rem)); max-height: min(760px, calc(100dvh - 2rem)); padding: 0; border: 0; background: var(--page); color: var(--ink); box-shadow: var(--shadow); }
dialog::backdrop { background: rgba(12, 27, 27, .58); backdrop-filter: blur(4px); }
dialog[open] { animation: sheet .25s ease both; }
.library-sheet header, .discussions-sheet header { display: flex; align-items: flex-start; justify-content: space-between; padding: 1.6rem 1.8rem 1.1rem; border-bottom: 1px solid var(--rule); }
.library-sheet h2, .discussions-sheet h2 { margin: 0; font-family: var(--reading); font-size: 2rem; }
.close-dialog { width: 36px; height: 36px; border: 1px solid var(--rule); background: transparent; color: var(--muted); font-size: 1.4rem; line-height: 1; }
.library-list { padding: .4rem 1.8rem; }
.library-item { display: grid; grid-template-columns: 38px 1fr auto; align-items: center; gap: .9rem; padding: 1.2rem 0; border-bottom: 1px solid var(--rule); }
.library-item:last-child { border-bottom: 0; }
.library-siglum { display: grid; width: 34px; height: 34px; place-items: center; background: var(--blue); color: #fff; font-family: var(--reading); }
.library-item:nth-child(2) .library-siglum { background: var(--red); }
.library-item strong { display: block; font-family: var(--reading); font-size: 1.1rem; }
.library-item small { display: block; margin-top: .15rem; color: var(--muted); font-size: .7rem; }
.library-status { color: var(--blue-bright); font-size: .68rem; font-weight: 600; }
.library-rule { margin: 0; padding: 1rem 1.8rem; background: var(--wash); color: var(--muted); font-size: .73rem; }

.discussions-sheet { width: min(600px, calc(100% - 2rem)); }
.discussions-toolbar { display: flex; align-items: center; justify-content: flex-end; gap: 1rem; padding: .8rem 1.8rem; background: var(--wash); color: var(--muted); font-size: .68rem; }
.discussions-toolbar button { padding: .35rem 0; border: 0; border-bottom: 1px solid var(--red); background: transparent; color: var(--ink); font-size: .7rem; }
.discussion-list { max-height: min(570px, calc(100dvh - 190px)); overflow-y: auto; padding: .35rem 1.8rem 1rem; }
.discussion-empty { padding: 3.5rem 1rem; color: var(--muted); font-family: var(--reading); font-size: 1.15rem; text-align: center; }
.discussion-row { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 1rem; padding: 1.1rem 0; border-bottom: 1px solid var(--rule); }
.discussion-row:last-child { border-bottom: 0; }
.discussion-open { min-width: 0; padding: 0; border: 0; background: transparent; text-align: right; }
.discussion-open strong { display: block; overflow: hidden; font-family: var(--reading); font-size: 1.08rem; font-weight: 600; text-overflow: ellipsis; white-space: nowrap; }
.discussion-open small { display: block; margin-top: .25rem; color: var(--muted); font-size: .67rem; }
.discussion-tools { display: flex; align-items: center; gap: .15rem; }
.discussion-tool { display: grid; width: 32px; height: 32px; place-items: center; border: 0; background: transparent; color: var(--muted); }
.discussion-tool:hover { background: var(--wash); color: var(--ink); }
.discussion-tool.is-pinned { color: var(--red); }
.discussion-tool svg { width: 15px; fill: none; stroke: currentColor; stroke-width: 1.6; }
.discussion-rename { grid-column: 1 / -1; display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: .5rem; }
.discussion-rename input { min-width: 0; padding: .55rem .65rem; border: 1px solid var(--rule); background: var(--page); color: var(--ink); font-family: var(--reading); font-size: 1rem; }
.discussion-rename button { padding: .4rem .7rem; border: 0; background: var(--blue); color: #fff; font-size: .7rem; }

[hidden] { display: none !important; }
@keyframes enter { from { opacity: 0; transform: translateY(14px); } to { opacity: 1; transform: none; } }
@keyframes blink { 0%,100% { opacity: .25; } 50% { opacity: 1; } }
@keyframes sheet { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: none; } }

@media (max-width: 1180px) {
  .app-frame { grid-template-columns: 210px minmax(0, 1fr); grid-template-areas: "saved product"; }
  .spine { display: none; }
  .saved-rail { display: grid; }
  .history-trigger { display: none; }
}

@media (max-width: 1080px) {
  .app-frame { grid-template-columns: 210px minmax(0, 1fr); grid-template-areas: "saved product"; }
  .opening, .reading { width: min(780px, calc(100% - 3rem)); }
}

@media (max-width: 900px) {
  .product { grid-template-rows: 62px minmax(0, 1fr) auto; }
  .masthead { grid-template-columns: 1fr auto auto; gap: .4rem; padding-inline: 1rem; }
  .wordmark span, .source-switch > span:last-child, .new-thread span { display: none; }
  .source-switch { justify-self: end; }
  .header-actions { gap: .35rem; }
  .history-trigger { min-width: 34px; width: 34px; padding: 0; }
  .history-trigger span { display: none; }
  .new-thread { display: inline-flex; width: 34px; height: 34px; align-items: center; justify-content: center; padding: 0; border: 1px solid var(--rule); }
  .opening { width: calc(100% - 2rem); gap: 1.8rem; padding: 2.2rem 0; }
  .opening h1 { font-size: clamp(3.6rem, 18vw, 5.2rem); }
  .prompts { grid-template-columns: 1fr; gap: .5rem; }
  .prompts button { min-height: 46px; }
  .reading { width: calc(100% - 2rem); padding-top: 1.4rem; }
  .discussion-head { margin-bottom: 2rem; }
  .discussion-head h1 { max-width: 70%; font-size: 1rem; }
  .conversation { gap: 2.4rem; }
  .turn + .turn { padding-top: 2.4rem; }
  .question-head { max-width: 92%; }
  .answer-copy { font-size: 1.08rem; line-height: 1.82; }
  .citation blockquote { -webkit-line-clamp: 5; }
  .ask-dock { padding: .6rem .65rem .55rem; }
  .ask-form { gap: .45rem; padding-left: .45rem; }
  .dock-caption { display: none; }
}

@media (max-width: 720px) {
  .app-frame { grid-template-columns: minmax(0, 1fr); grid-template-areas: "product"; }
  .saved-rail { display: none; }
  .history-trigger { display: inline-flex; }
}

@media (max-height: 660px) and (min-width: 721px) {
  .opening { padding-block: 2rem; }
  .opening h1 { font-size: clamp(3.8rem, 7vw, 5.5rem); }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; scroll-behavior: auto !important; }
}